Javaweb three frames and MVC design PatternsReproduced, please see the original 50890705First, the concept of MVC design pattern 1.MVCFirst we need to know that the MVC pattern is not unique to the Javaweb project, MVC is a software architecture model in software engineering that divides software systems into three basic parts: model, view, and controller, which is MVC. It is a model of software design, the first proposed for Trygve Reenskaug, for the Xerox
object relationships through touch.
If the Xerox PARC Research Center brings Parc 1.0, then the iphone is Parc 2.0. Now, Google wants material design to become Parc 3.0, to open up a new era. Google believes that the design language of material can take us again, incorporating a touch screen, gesture manipulation, voice control, and Google's own intelligent algorithms and more new technologies. The combination of these technologies allows our brain
pointer between procedures because the invoked procedure and the calling procedure run on the same memory space. The remote procedure does not enablePointer as a parameter because the remote procedure runs in a completely different address space from the caller.Again, because a remote call cannot share the caller's environment, it cannot directly access the caller's I/O descriptor or operating system functionality.Iv. Several versions of remote procedure calls(1) Sun RPC (UDP, TCP)(2)
Folder:
Reject allowedFull Control □□Modify □□Read and run √ □List folder directories √ □Read √ □Write □□
B) D: The wwwrootestdatadb1.mdb file itself grants the user ASPNET the following permissions:√ Allow propagation of inherited permissions from parent to this object
1.1 For An aspx program that only contains the "SELECT" command, the above permission settings are not available during running, that is, the above permissions have met the operatio
table mysql. user set password = password ('buffer') where User = 'buffer' and Host = 'localhost'; mysql> flush privileges;
6. delete a user
// Log on to MySQLmysql-uroot-pEnter password as the root user: // delete user buffmysql> delete from mysql. user where User = 'buffer' and Host = 'localhost'; mysql> flush privileges;
7. delete a database
mysql>drop database bluebuff;4. view the permissions granted by the user
In mysql, permissions granted to users may be divided into global permissions,
Abstract: This article describes how to create a user and how to assign permissions to the user. Although GRANT statements can assign permissions to users for ease of use, from the perspective of security, from the perspective of increasing understanding of the system, you should try to use the method of directly modifying the authorization table. In this way, authorization can be controlled more accurately, and the authorization table can be fully understood to avoid the Security reduction of t
:
With_option is a restriction or management of the granted permissions. For example, with grant option indicates that the authorized user has the ability to grant the same permissions to other users.
Delete:
To delete a permission, use the revoke (official documentation) command. The specific format is as follows:
REVOKE priv_type [(column_list)] [, priv_type [(column_list)]] ... ON [object_type] priv_level FROM user [, user] ...REVOKE ALL PRIVILEGES, GRANT OPTION
the program the lowest NTFS permission at the beginning of the experiment:
A) grant the following permissions to ASPnet in the d: \ wwwroot \ test \ data \ Folder:
Allow
Reject
Full Control
□
□
Modify
□
□
Read and run
√
□
List folder Directories
√
□
Read
√
□
Write
□
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B) The D: \ wwwroot \ test \ data \ db1.mdb file itself grants the user
"enterprise application solution"/e/D "Administrator"/y
Xcacls "enterprise application solution"/e/D "linli"/y
Use xcacls.exe to modify NTFS permissions
Xcacls.exe syntaxXcacls file name [/T] [/E] [/C] [/g User: perm; spec] [/r user] [/P User: perm; spec [...] [/d user [...] [/y]The file name indicates the name of the file or folder that the ACL or access control entry (ACE) normally applies. All standard wildcards can be used.
/T recursively checks the current folder and all its subfolders, a
lowest NTFS permission at the beginning of the experiment:
A) grant the following permissions to ASPnet in the d: \ wwwroot \ test \ data \ Folder:
Reject allowedFull Control □□Modify □□Read and run √ □List folder directories √ □Read √ □Write □□
B) The D: \ wwwroot \ test \ data \ db1.mdb file itself grants the user ASPnet the following permissions:√ Allow propagation of inherited permissions from parent to this object
1.1 For An ASPX p
tablespace yyaccp
Datafile 'd: \ oracle \ oradata \ oracle \ yyaccp. dbf'
Size 5 M autoextend on;
5. You can create a user name using commands in oracle. The following command creates a yyaccp user name,
And determine the default tablespace and temporary tablespace for it
Create user yyaccp identified by yyaccp
Default tablespace yyaccp
Temporary tablespace temp;
6. If the user to be authorized can perform certain operations in the database, the user should be assigned
The permission to perfo
When migrating to MySQL databases, it is sometimes necessary to migrate users and permissions within the source database. For this migration we can get the user's relevant permissions from the Mysql.user table to generate the corresponding SQL statements, and then execute the generated SQL statements on the target server. This article provides a script to generate the extraction user rights and gives a demo.
1. Script to generate user rights
Copy Code code as follows:
[Root@hkb
You can have 2 different ways to add users: by using the grant statement or by directly manipulating the MySQL authorization table. The better approach is to use the GRANT statement because they are more concise and seem to have fewer errors.
Display the user's authorization using the show grants statement
You can view the authorization form directly, or you can use the show grants statement to view the a
Create USER statement, as follows:MySQL>CREATEUSER0 rows affected (0.48 sec) Then list the user to see the user we just created. We can also add a password when creating a user, using identified by PASSWORD, as follows:MySQL>CREATEUSERby'123456' 0 rows affected (0.06 sec) When renaming a user account, use the Rename user statement, as follows:MySQL>USERto0 rows affected (0.04 sec)Delete user account To delete a user account, use the drop USER statement, as follows:MySQL>DROPUSER0 rows aff
Show open tables;Based on my use of MySQL, the commonly used MySQL show statements are listed as follows:1.show databases; Displays the names of all databases in MySQL2.show tables [from database_name]; Displays the names of all tables in the current database3.show columns from table_name; Show column names in table, same as DESC tablename4.show [FULL] processlist;//all process information that is running5.show grants for USER_NAME; Displays the permi
Tags: des style io ar color using SP for strongThe common MySQL show statements are listed below:1.show databases; Displays the names of all databases in MySQL2.show tables [from database_name]; Displays the names of all tables in the current database3.show columns from table_name; Show column names in table, same as DESC tablename4.show [FULL] processlist;//all process information that is running5.show grants for USER_NAME; Displays the permissions o
|TestUser | %|+-------------+----------+-----------+2 rows in Set (0.00 sec)View PermissionsShow Grant view the syntax for account information:Show grant for ' user ' @ ' host ';Example:Querying user testuser permissions using the Show grants statementMysql> Show grants for ' testUser ' @ '% ';+--------------------------------------------------------------------------------+|
| *0756A562377EDF6ED3AC45A00B356AAE6D3C6BB6 |+------------------+-----------+-------------------------------------------+Grant Database user PermissionsRight after you create a new user, it has no privileges. The user can be used to log in to MySQL, but it can ' t is used to do any database changes. Give the user permissions for your new database by running the following commmand:GRANT ALL PRIVILEGES ON demodb.* to [emailprotected];Then, flush the privileges-to-make the change take effe
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